Machine for flanging sheet metal.



O. J. GROEHN. MACHINE EUR ELANGING SHEET METAL.

APPLICATION FILED 00T. 30, 1912. 1, l 1 2,696. Patented 001;. 6, 1914.

2 SHEETS-SHEET l y [72 fen-6dr 51960 Grao/71.

o. J. GROEHN. MACHINE POR PLANGING SHEET METAL. APPLICATION FILED 00T. 30, 1912.

1,1 12,696. Patented 0015.6,1914

2 SHEETS-SHEET 2.

Q/@d (ym Awa www UNITED sTATEs PATE OTTO J. GROEIIN, OF DETROIT, MICHIGAN, ASSIGNOR T0 BRISCOE MANUFACTURING COMPANY, or DETROIT, MICHIGAN, A

CORPORATION 0F MICHIGAN.

MACHINE FOR ELANGING SHEET METAL.

Specification of Letters Patent.

Patented Oct. 6,1914.

Application filed October 30, 1912. Serial No. 728,685.

the invention to provide means for forming cppositely-bent, hooked anges upon the opposite edgesof metallic strips. It is a further object to adaptl the machine for 0pcrating upon strips of different widths.

IVith these objects in view the invention consists in the construction as hereinafter set forth.

In the drawings: Figure 1 is a plan view of the machine; Fig. 2 is an end elevation thereof; Fig. 3 is a perspective view of the work formed by the machine; Figs.4, 5 and are cross sections showing the blank in the several stages of formation; and Fig. 7 is a section in the plane of one of the rolls.

A is the frame or bed, upon which is mounted the parallel side frames B and C.'

Extending transversely between these side frames and journaled therein, are series of cross shafts D E E and F F. 'Ihe shafts E E F F are arranged in pairs, and are formed of teleseopically-engaging sections splined to each other.

Gr H are cooperating formn rolls upon one of the telescopic sect-ions cfg each of the shafts E E', and G II are reversely arranged forming rolls on the correspondmg l.sections of said shafts E and E. I J and are ner upon the telescopic sections of the shafts F and F, the arrangement being such that in the passing of a strip into engagement with said forming rolls, the opposite edges of said strip will be ianged in opposite directions.

To permit of operating upon strips of varying widths, one of the side frames, such as B, is laterally adjustable,I and to this end is secured by clampin bolts K, and is held in parallelism to the rame C by guides L. In adjusting the frame, the sections 0f the shafts E E F F journaled therein, together ythe bending of the forming rolls mounted in like man-l with the forming rolls G H I J will be carried and adjustedv in relation to the opposite forming rollsG H I J. Endwisc displacement cf f the shaft sections with reference to their respective frames is prevented by collars L upon opposite sides of the journal bearings.

M M are return-bending or hook-forming rolls invalinement with the rolls G H and I J; and N N are corresponding return-bending or hook-forming rolls in alinement with the rolls GI-I I J Thesehook-forming rolls are arranged in horizontal planes, and are respectively-carried by bearings O and P on the side frames B and C.

The various rolls are driven by a `suitable drive train, comprising the intermeshing gear-wheels Q R S T U V and W X. The gear-wheels V and X driveJ shafts respectively upon the frames B and C, which are connected by bevel gear-wheels Y and Y respectively with ,the vertical shafts Z and Z, on which the rolls M and N are mounted. I'Vith the construction as described, it will be understood that the forming rolls G II I J M N are in alinement with each other, and in like manner the rolls G III I J M N are in alinement; but that the two series of rolls are relatively adjustable. Thus whenever the frame B is laterally adjusted, it will carry with it the series of rolls mounted thereon and thus the two series may be set to correspond to the width of any strip of metal to be formed.

In operation the rolls G I-I G II initiate edges of the strips; the rolls I J I J complete a righteangle bend; and the rolls M M N N effect the return bending ofthe flange, the completed product having reverse bent anges, as shown in Fig. 3. What I claim as my invention is: 1. A machine for Hanging sheet metal strips,comprising a bed, a side frame mounta second side frame, laterally aded thereon, justably mounted upon the opposite side of said bed, guiding means for holding said frame inparallelism with the rst-mentioned frame in each position of adjustment, a series of shafts formed in telescopingsections, extending between said frames, and having their corresponding sections mounted in the respective frames, a series of alined forming rolls mounted on the shaft sections of one of said fiines, series el' aimed forming shaft sections of the opposite f Liieeee and e corresponding rolls mounted on the rame.

2. ln a machine for Hanging the opposite edge portions of sheet biuution with parallel metal strips, the cornframes, of cross shafts extending between said frames and formed in teleseopicnlly engaging seeti endwise inovement'in their resp lo alined Corresponding sel-ies oil2 return-bending` rolls mounted ons held from ective frames, Hanging and on the telescopic sections of the respective frames, one

of sai-d frames beingleteral ly adjustable @TTG d. GROEHN. 'Vitnesses:

JAMES BARRY, H. LE. BOWMAN. 

